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  1. <!DOCTYPE html
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  2.   SYSTEM "about:legacy-compat">
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  3. <html lang="en-us"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta charset="UTF-8"><meta name="copyright" content="(C) Copyright 2016"><meta name="DC.rights.owner" content="(C) Copyright 2016"><meta name="DC.Type" content="topic"><meta name="description" content="Several configuration changes can significantly reduce DITA-OT processing time."><meta name="DC.Relation" scheme="URI" content="../user-guide/troubleshooting-overview.html"><meta name="DC.Relation" scheme="URI" content="http://en.wikipedia.org/wiki/Solid-state_drive"><meta name="DC.Relation" scheme="URI" content="http://en.wikipedia.org/wiki/RAM_drive"><meta name="DC.Format" content="XHTML"><meta name="DC.Identifier" content="reducing-processing-time"><meta name="DC.Language" content="en-US"><link rel="stylesheet" type="text/css" href="../css/commonltr.css"><link rel="stylesheet" type="text/css" href="../css/dita-ot-doc.css"><title>Reducing processing time</title></head><body id="reducing-processing-time"><header role="banner"><div class="header">
    4. 

  4.   <p>DITA Open Toolkit</p>
    5. 

  5.   <hr>
    6. 

  6. </div></header><nav role="toc"><ul><li><a href="../index.html">DITA Open Toolkit 2.3</a></li><li><a href="../release-notes/index.html">Release Notes</a></li><li><a href="../getting-started/index.html">Getting Started</a></li><li><a href="../user-guide/index.html">User Guide</a><ul><li><a href="../user-guide/transforming-dita-content.html">Publishing DITA content</a></li><li><a href="../user-guide/AvailableTransforms.html">Output formats</a></li><li><a href="../user-guide/DITA_spec-support.html">DITA specification support</a></li><li><a href="../user-guide/DITA-globalization.html">Globalizing DITA content</a></li><li><a href="../user-guide/troubleshooting-overview.html">Troubleshooting</a><ul><li><a href="../user-guide/prerequisite-software.html">Prerequisite software</a></li><li><a href="../user-guide/DITA-messages.html">DITA-OT error messages</a></li><li><a href="../user-guide/other-errors.html">Other error messages</a></li><li><a href="../user-guide/log-files.html">Log files</a></li><li><a href="../user-guide/dita-command-help.html">Accessing help for the dita command</a></li><li><a href="../user-guide/determining-version-of-ditaot.html">Checking the DITA-OT version</a></li><li><a href="../user-guide/enabling-debug-mode.html">Enabling debug mode</a></li><li><a href="../user-guide/increasing-the-jvm.html">Increasing Java memory allocation</a></li><li class="active"><a href="../user-guide/reducing-processing-time.html">Reducing processing time</a></li></ul></li></ul></li><li><a href="../parameters/index.html">Parameter Reference</a></li><li><a href="../dev_ref/index.html">Developer Reference</a></li><li><a href="../user-guide/dita-and-dita-ot-resources.html">DITA Resources</a></li></ul></nav><main role="main"><article role="article" aria-labelledby="ariaid-title1">
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  7.    <h1 class="title topictitle1" id="ariaid-title1">Reducing processing time</h1>
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  8.    
    9. 

  9. 

  10.    <div class="body"><p class="shortdesc">Several configuration changes can significantly reduce DITA-OT processing time.</p>
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  11.       <section class="section"><h2 class="title sectiontitle">Disable debug attribute generation</h2>
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  12.          
    13. 

  13.          <p class="p">The <span class="keyword parmname">generate-debug-attributes</span> parameter determines whether debugging attributes are
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  14.             generated in the temporary files. By changing the value to <code class="ph codeph">false</code>, DITA-OT will no longer
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  15.             generate the <code class="keyword markupname xmlatt">@xtrf</code> and <code class="keyword markupname xmlatt">@xtrc</code> debug attributes. This will make it more
    16. 

  16.             difficult to track down the source file location from which a given issue may have originated, but it will
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  17.             reduce the size of the temporary files. As a result, XML parsing will take less time and overall processing
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  18.             time will be reduced.</p>
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  19.       </section>
    20. 

  20.       <section class="section"><h2 class="title sectiontitle">Use a fast disk for the temporary directory</h2>
    21. 

  21.          
    22. 

  22.          <p class="p">DITA-OT keeps topic and map files as separate files and processes each file multiple times during
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  23.             preprocessing. Thus reading from disk, parsing XML, serializing XML, and writing to disk makes processing
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  24.             quite IO intensive. Use either an
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  25.             <a class="xref" href="http://en.wikipedia.org/wiki/Solid-state_drive" target="_blank">SSD</a> or a
    26. 

  26.             <a class="xref" href="http://en.wikipedia.org/wiki/RAM_drive" target="_blank">RAM disk</a> for
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  27.             temporary files, and never use a temporary directory that is not located on the same machine as where the
    28. 

  28.             processing takes place.</p>
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  29.       </section>
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  30.       <section class="section"><h2 class="title sectiontitle">Reuse the JVM instance</h2>
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  31.          
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  32.          <p class="p">For all but extremely large source sets, the JVM will not have enough time to warm-up. By reusing the same
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  33.             JVM instance, the first few DITA-OT conversions will be “normal”, but when the JIT starts to kick in, the
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  34.             performance increase may be 2-10 fold. This is especially noticeable with smaller source sets, as much of
    35. 

  35.             the DITA-OT processing is I/O intensive.</p>
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  36.       </section>
    37. 

  37.       <section class="section"><h2 class="title sectiontitle">Use the latest Java version</h2>
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  38.          
    39. 

  39.          <p class="p">DITA-OT 2.0 requires Java 7, but using the latest version Java 8 will further reduce processing time.</p>
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  40.       </section>
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  41.    </div>
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  42. 

  43.    <nav role="navigation" class="related-links"><div class="familylinks"><div class="parentlink"><strong>Parent topic:</strong> <a class="link" href="../user-guide/troubleshooting-overview.html" title="This section contains information about problems that you might encounter and how to resolve them.">Error messages and troubleshooting</a></div></div><div class="linklist linklist"><strong>Collected links</strong><br><div><a class="link" href="http://en.wikipedia.org/wiki/Solid-state_drive" target="_blank">SSD</a></div><div><a class="link" href="http://en.wikipedia.org/wiki/RAM_drive" target="_blank">RAM disk</a></div></div></nav>
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  44. </article></main></body></html>
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